Long before a tweet was a 140-character post on Twitter, it was a component of birdsong. Now the microblogging site is singing the praises of its new Twitter #Music, an app that will help users find tunes they'll like, based on their current preferences and songs' popularity on Twitter. The app utilizes Twitter activity, including tweets and other engagements, not only to identify the most-popular tracks, but also to detect emerging artists.